<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="vue.js"></script>
</head>
<body>
    <div id="app">{{title}}</div>
    <div id="app1">{{title}}</div>
    <script>
        var Vue3 = Vue.extend({
            data(){
                return{
                    title:'hello'
                }
            }
        })
        var vm = new Vue3({
            el:'#app'
        })
        var vm = new Vue3({
            el:'#app1'
        })
    </script>
</body>
</html>